Electric plug-receptacle.



W. ILE.

ELECTRIC PUG REcEPIAcLE.

APPUCATION FILED FSB-19.1917.

Patented Apr. 15, 1919.

Inventor: Q/zad'm 9% 'ru-m. 7....) w, rmmnmm. wuuuwron. n c.

'WILLIAM ILE, OF 'I'ORONTO, QNT-A310, CANADA.

ELEOTREC PLUGMCEMAGLE.

pplicattonflnd February 19, 1917.

To allevham z't may c'oncev'n:

Be it known that I, WInLIAl/I ILE, a subject of the King of Great Britain, `and resident of the cityof Toronto, county of 'Yorln Province of Ontario, in the Dominion of Canada, have invented certain new and nseful Improvements in Electric Plug-RecepF tacles, as described Vin the following speci' fication and illustrated in the accompanyin drawings, that form part of the same.

he principal objects of `the inventrion are, to provide a neat and simple form of pllu receptacle for use in electrical fittings w io will be extremely neat in appearanoe and will be very rigid and the parts will not be susceptible of working loose and causing electrical troubles.

The principal feature of the invention consists in the novel constnnetian :and -arrangement of an electrical plug and o, 'plurality of socket members electrically con.- nected therewith, whereby the whole is united in a rigid and compact unit, the electrical connections of the shells of the plug and sockets being efl'ectively separated from the central electrical connection.

In the drawings, Figure 1 is a side elevational view of a receptacle constructed according to this invention.

Fig. 2 is a Vertical sectional view through the receptacle.

Fig. 3 is a detail perspective view of the porcelain plug of the upper member being shown bottom side up.

Plug receptacles have been marketed for a lon time formed of a number of arts securedg together in various manners ut it is believed that all of these have the common fault of working loose and forming bad electrical contacts which are extremely dangerous.

According to the present invention the plug 1 is formed of a porcelain block 2 and a threaded metal casing 3. The block 2 is formed with a central hole 4 countersunk at the top and a recess 5 is formed in the bottom end to receive the fiat metal member 6.

7 are notches or recesses formed in the lower edge of the block 2 into which the bottom edge of the metal casing 3 is Dindented.

The upper end 8 of the metal casing is ilanged inwardly to engage the top of the block 2. VVhen the lower edge is indented into the notches in the block the metal becomes firmly secured to the porcelain. The

Speoflcaton of Letters-Patent.

Patented Apr. '15, 1919.

Serial No..149,458.

flat metal member 6 fits snugly in the recess 5 and is Jprovided With a central hole 9 through which a bolt 10 which passes through the central hole 4 in the block 2 extends.

A nut 11 .is threaded on the lower end of the Vbolt 10 and looks the member 6 in place. The .recess 5 is preferably of eircular form S0 that `the top of the metal member 6 may be pl-aed in same. The circular recess is adapted to receive the top of the central member adapted fora three or four socket receptacle. The member 0 is bent downwardlyand isiprovided with laterally turned ends 12 whic are adapted to receive the center contact member 13.

le are socket fshells :formed of s un Sheet metal threaded and having inwar ly turned fianges 15 .at the top with a large center hole 1143.

17 are disks of insulating material fitted into the interior of the socket shells l at the top end and abutting the flanges 15, and 18 are corresponding disks arranged at the outer side of the flanges 15.

The contact members 13 pass through the disks 17 and 18 into the ends 12 of the member 6 and bind the said disks together holding the sockets firmly and as the said disks are of insulating material the shells are elfectively insulatecl.

The socket shells 14 are electrically connected with the plug casing 3 by means of metal strips 19 which have flanged ends 20 which fit into the indented portions of the said casing 3 bent into the notches. These are firmly soldered in place.

The structure thus formed is then incased in a surroundin jacket of insulating material such as bake ite which is molded around the receptacle shells and around the bottom ends of the threaded plug casing.

All the parts are firmly embedded in a rigid block so that they cannot work loose or become disconnected. The bolt 10 with the strips 6 and members 13 form the central electrical connections to the lamps or other plugs secured in the sockets and the outer shells and threaded metal casing are distinctly and entirely electrcally separated from the central conneetions.

What I claim as my invention is 1. A plug receptacle, comprising, a plug of insulating material having a single hole extending therethrough from end to end, a threaded metal casing encircling' a portion of said plug, a bolt extendin through the hole in said lug, a metal mem er seoured to said bolt and earrying branch electrical contacts, socket shelle` connected with, and insulated from, said central metal member, flexble electrical connections secured to the ex terior of said socket shells and to the in- Ward end of the plug casing, and a unitary mass of insulating material surrounding said socket shells and the inward end of the plug casing and completely embedding the electrical connections between the plug and the sookets.

2. A plug receptacle, comprising, a circular plug having notches in the ed es and a central orifice and a recess in the ottom communicating with said orifice, a threaded metal casing surrounding said plug and having indents extending into said notches, a bolt extending through the central orifice in said plug, a central metal member secured on said bolt and lifting in said recess, Said central memberiextending angularly outward from said plug and having laterally turned ends, a pair of insulating disks secured to each of the ends of said central member, socket shells held between said insulating disks, metal strips connected to said socket shells and to said plug casing, and a mass of insulatin material molded around said shells and t e lower end of said plug and incasing the intermediate eonnections.

3. A plug receptacle, comprising, a plug of insulating material threaded externally and having a recess in the inner end, a threaded metal casing encireling said plug a bolt extending through said insulated center, a metal member secured to said bolt and fitting into the recess in said plug, threaded metal socket shells having inturned flan es at the upper ends, metal strps rigi ly secured at one end to said plug casing and at the other end to the fiange ends of said socket shells, central contacts for each of said sockets secured to the central metal member and insulated from said casings, and a unitary mass of insulating material molded around and embedding said shells and electrical connections.

WILLIAM ILE.

Gopies of this patent may be obtained tor five cents each, by addressng the "Commissioner of Patents, Washington, D. 0. 

